NVIDIA GeForce GT 640 vs AMD Radeon HD 7850

VS

NVIDIA GeForce GT 640

AMD Radeon HD 7850

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 2GB VRAM Radeon HD 7850 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages

Lower TDP (65W vs 130W)

AMD Radeon HD 7850 's Advantages

Larger VRAM bandwidth (153.6GB/s vs 28.51GB/s)

640 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

Radeon HD 7850 +154%

1.761 TFLOPS

GeForce GT 640

VS

Radeon HD 7850

Graphics Card

Jun 2012

Release Date

Mar 2012

GeForce 600

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

891 MHz

Memory Clock

1200 MHz

Memory

2GB

Memory Size

2GB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

256bit

28.51GB/s

Bandwidth

153.6GB/s

Render Config

-

Compute Units

16

-

384

Shading Units

1024

32

TMUs

64

16

ROPs

32

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

27.52 GPixel/s

28.86 GTexel/s

Texture Rate

55.04 GTexel/s

-

692.7 GFLOPS

FP32 (float)

1.761 TFLOPS

28.86 GFLOPS

FP64 (double)

110.1 GFLOPS

Board Design

65W

TDP

130W

250 W

Suggested PSU

300 W

1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

Outputs

1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2

None

Power Connectors

1x 6-pin

Graphics Processor

GK107

GPU Name

Pitcairn

GK107-300-A2

GPU Variant

Pitcairn PRO (215-0828062)

Kepler

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.27 billion

Transistors

2.8 billion

118 mm²

Die Size

212 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

3.0

OpenCL

1.2

1.1

Vulkan

1.2

3.0

CUDA

-

5.1

Shader Model

5.1

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